SY89853U Precision Low-Power Dual 2:1 LVPECL MUX with Internal Termination General Description The SY89853U features two, low jitter 2:1 differential Precision Edge multiplexers with 100K LVPECL (800mV) compatible Features outputs, capable of handling clocks up to 2.5GHz and data streams up to 2.5Gbps. Dual 2:1 MUX, each channel selects from inputs The SY89853U differential inputs include Micrels Unique, patent-pending input isolation design unique, 3-input termination architecture that allows minimizes crosstalk users to interface to any differential signal (AC- or DC- Low power 210mW (V = 2.5V) CC Coupled) as small as 100mV without any level shifting Guaranteed AC performance over temperature and or termination resistors networks in the signal path. The voltage: result is a clean, stub-free, low jitter interface solution. - DC-to->2.5Gbps data rate throughput The differential 800mV LVPECL outputs have fast - <360ps IN-to-Q t rise/fall times guaranteed to be less than 180ps. pd - <180ps t /t times r f The SY89853U operates from a 2.5V 5% or a 3.3V 10% supply, and is guaranteed over the full industrial Ultra-low jitter design: temperature range (40C to +85C). For applications - <1ps random jitter RMS that require higher performance, consider the - <10ps deterministic jitter PP SY58026U. The SY89853U is part of Micrel s Precision - <10ps total jitter (clock) PP Edge product family. - <0.7ps crosstalk-induced jitter RMS All support documentation can be found on Micrels web Unique, patent-pending 50 input termination and site at www.micrel.com. VT pin accepts DC- and AC-coupled inputs (CML, LVDS, PECL) 800mV LVPECL output swing Power supply 2.5V 5% or 3.3V 10% 40C to +85C temperature range Available in 32-pin (5mm x 5mm) QFN package Applications Data communication systems All SONET OC-3 to OC-48 applications All Fibre Channel applications All GigE applications Markets LAN/WAN communication Enterprise servers ATE Test and measurement United States Patent No. RE44,134 Precision Edge is a registered trademark of Micrel, Inc Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY89853U Functional Block Diagram Truth Table SEL Q 0 IN0 Input Select 1 IN1 Input Select 2 M9999-082907-C August 2007 hbwhelp micrel.com or (408) 955-1690